OOD Questions: Furniture Wood Metal Chair Table

A furniture can be made of Wood, metal or may be something material (in future). The furniture can be of different types like chair, table etc Now a wooden furniture must be tested against charcoal properties. A metal furniture must be testes against electricity conductivity. How will we design it's OOD.

I don't know whether following approach is correct or not.

Interface MaterialTesting { Testing ();}

Public class WoodTesting implements MaterialTesting 
{ // define body for wood testing method testing(); // }
Public class MetalTesting implements MaterialTesting 
{ // define body for metal testing method testing(); // }

Public Class Furniture
{
WoodTesting woodtestObject;
MetalTesting metaltestObject;

Furniture(MaterialType material)
{
if material isInstanceOf(WoodTesting)
woodtestObject = new WoodTesting ();

if material isInstanceOf(MetalTesting)
metaltestObject= new MetalTesting ();
}
}
Public Class Chair extends Furniture 
{
Chair(MaterialType material)
{
super();
}
}

Class DriverClass{
PSVM()
{
Furniture woodchair  = new Chair(wood);
Furniture metaltable  = new Table(metal);

woodchair.Testing();
}

And we have to declare another MaterialType class.

Also, please tell how it can be implemented using Factory design pattern.